91影视

The data provided is on the female diastolic blood pressure (mm Hg).

A stemplot is a graph that consists of stems and leaves expressed on the left and right sides of the vertical axis. The observations are split as stem and leaf according to the number of digits or decimals.

The steps to compute the stemplot:

• Arrange the data values in ascending order.
• Consider the digit at tens place of the pulse rate value as the stem and the one at the units place as the leaf.
• Draw a vertical line to separate the stem and leaves.
• Write the stems on the left side and the leaves on the right side.
• Note down the key of the stemplot.

The following stemplot is constructed:

Key: 8|2 represents 82 mm Hg diastolic blood pressure.

Note that the stemplot has values arranged from the smallest to the largest.

The middle value can be identified from the stemplot according to the total number of values present.

The total number of values is 24.

The two middle values correspond to the 12^th and 13^th values.

From the plot, it can be observed that the 12^th and the 13^th values are identified as 7|2 and 7|4, respectively.

Therefore, the two values closest to the middle of the data are equal to 72 mm Hg and 74 mm Hg.